Method for producing deuterium depleted water, method for separating heavy water and light water, and method for producing deuterium concentrated water
US-2018111090-A1 · Apr 26, 2018 · US
Method for producing deuterium depleted water, method for separating heavy water and light water, and method for producing deuterium concentrated water
US10471389B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-10471389-B2 |
| Application number | US-201615561871-A |
| Country | US |
| Kind code | B2 |
| Filing date | Mar 22, 2016 |
| Priority date | Mar 31, 2015 |
| Publication date | Nov 12, 2019 |
| Grant date | Nov 12, 2019 |
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Abstract
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A method for producing deuterium depleted water by removing heavy water and semi-heavy water from water, the method including: a desorption process in which a relative pressure around a predetermined adsorbent with adsorbed water vapor is reduced, and in which water vapor desorbed from the adsorbent is recovered during a period of time when a desorption rate of light water>a desorption rate of the heavy water and semi-heavy water.
First claim
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The invention claimed is: 1. A method for producing deuterium depleted water by removing heavy water and semi-heavy water from water, the method comprising: a desorption process in which a relative pressure of water vapor around a predetermined adsorbent with adsorbed water vapor is reduced, and in which water vapor desorbed from the adsorbent, having a deuterium concentration lower than water vapor adsorbed by the adsorbent is recovered during a period of time when a desorption rate of light water>a desorption rate of the heavy water and semi-heavy water. 2. A method for producing deuterium depleted water by removing heavy water and semi-heavy water from water, the method comprising: a desorption process in which a relative pressure of water vapor around a predetermined adsorbent with adsorbed water vapor is reduced, and in which water vapor desorbed from the adsorbent, having a deuterium concentration lower than water vapor adsorbed by the adsorbent is recovered only during a period of time when a desorption rate of light water>a desorption rate of the heavy water and semi-heavy water. 3. A method for producing deuterium depleted water by removing heavy water and semi-heavy water from water according to claim 1 , the method comprising: a desorption process in an upper stream in which two or more predetermined adsorbents are arranged in series in advance so as to reduce a relative pressure of water vapor around the adsorbent in the upper stream with adsorbed water vapor and to recover water vapor desorbed from the adsorbent in the upper stream during a period of time when a desorption rate of light water>a desorption rate of the heavy water and semi-heavy water; and a desorption process in a lower stream in which the adsorbent in the lower stream is allowed to adsorb the recovered water vapor so as to reduce a relative pressure of water vapor around the adsorbent in the lower stream and to recover water vapor desorbed from the adsorbent in the lower stream during the period of time when the desorption rate of the light water>the desorption rate of the heavy water and semi-heavy water. 4. A method for separating water into light water, heavy water, and semi-heavy water, the method comprising: reducing a relative pressure of water vapor around a predetermined adsorbent with adsorbed water vapor; and desorbing, from the adsorbent, water vapor having a deuterium concentration lower than water vapor adsorbed by the adsorbent during a period of time when a desorption rate of the light water>a desorption rate of the heavy water and semi-heavy water. 5. A method for producing deuterium concentrated water by removing light water from water, the method comprising: a desorption process in which a relative pressure of water vapor around a predetermined adsorbent with adsorbed water vapor is reduced, and in which water vapor having a deuterium concentration lower than water vapor adsorbed by the adsorbent is desorbed from the adsorbent during a period of time when a desorption rate of the light water>a desorption rate of heavy water and semi-heavy water, thereafter recovering water remaining in the adsorbent and having a deuterium concentration higher than the water vapor adsorbed by the adsorbent.
Assignees
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Classifications
- B01D59/26Primary
by sorption, i.e. absorption, adsorption, persorption · CPC title
Pressure swing adsorption · CPC title
Zeolites · CPC title
Water · CPC title
Water · CPC title
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- What does patent US10471389B2 cover?
- A method for producing deuterium depleted water by removing heavy water and semi-heavy water from water, the method including: a desorption process in which a relative pressure around a predetermined adsorbent with adsorbed water vapor is reduced, and in which water vapor desorbed from the adsorbent is recovered during a period of time when a desorption rate of light water>a desorption rate of …
- Who is the assignee on this patent?
- Univ Shinshu, Kotobuki Tsushou Co Ltd, Shinsu Univ
- What technology area does this patent fall under?
- Primary CPC classification B01D59/26. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Tue Nov 12 2019 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 1 related publication on this page (citations in our corpus or others sharing the same primary CPC).